common:dotlock:w32: Minor fixes for Windows.
* common/dotlock.c (any8bitchar): Define under HAVE_DOSISH_SYSTEM. (dotlock_create_w32): Add missing call of UNLOCK_all_lockfiles, even though it's currently not implemented yet. (dotlock_take_w32): Use my_set_errno, like other places.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>